Free Shipping Offers are for Standard Ground Delivery service and are only valid for shipping addresses within the 48 Contiguous United States. Truck freight and oversize charges still apply unless otherwise notes and can only be shipped to the lower 48 States.Same Day Shipping (on most parts) if you order by 5PM EST on a business day. We ship via UPS Ground and/or USPS to all locations in the Continental 48 States.

Product Resources

100% New. This Powermaster 200 Amp Mustang Alternator is 100% brand new, not re-manufactured like other companies sell and is fully tested at the time of assembly. It comes complete with internal voltage regulator and 6 groove serpentine pulley. A 200 Amp alternator will increase the charging capacity of your Mustang at all RPM Ranges.

More Power. The Powermaster Alternator produces 130+ amps at idle (2000 alternator shaft RPM), and 200+ amps at maximum (6000 alternator shaft RPM). It is required to upgrade the main power wire because this alternator has a higher output than stock.

Powdered Coated Finish. This Powermaster Alternator not only improves your Pony's power, but it also improves your Mustang's under hood appearance with an aggressive baked on black powder coated finish.

Peace of Mind. Why waste your time and money rebuilding your old alternator again and again when it will only fail, replace it with a brand new high performance alternator from Powermaster for peace of mind.

Application. The Powermaster 6G Series Alternator is a direct fit replacement with no mounting bracket modifications required to be installed in a 1999-2004 GT Mustang. The stock belt can be used on original equipment vehicles.

I had this installed along with the power cable upgrade and a new engine (by a certified mechanic) and the alternator overcharged and fried itself. The power cable connection at the alternator was melted like a candle. My advice, don't buy this overpriced alternator. The shop owner says this is the second time now that he has seen a powermaster alternator fry itself.

The stock alternator had problems keeping up with the stereo that I have in the car. After installing this alternator, I haven't had the headlight dim at all. On top of the great performance, it really looks awesome! Really ties all the chrome items under the hood together.

I purchased this mainly to insure that maximum amperage and power was being delivered to my ignition coil on plug packs and fuel pump at idle and under load. I also have an aftermarket stereo head unit and wanted to insure that there is no power loss to the headlamps when in use.
When the alternator arrived it was well packed with injection foam packets to make sure that there was no movement during transport. The alternator also came with a proof of performance certificate what showed when the date it was tested, power reading at idle, simulated cruising rpm, and maximum rpm and maximum voltage delivery. It gave me confidence in knowing that the alternator was ready for high demand use.
Install was quick and easy with basic hand tools. It took me less than 15 minutes to do the work. I previously purchased a power wire from AM to protect the electrical system and handle the increased supply load. Acceleration is much smoother and the instant of hesitation that I was previously experienced went away. I feel at a minimum that an owner should upgrade their power wire and alternator to insure that you are getting peak electrical power and performance out of your car.
This alternator will be ready to handle additional mods as you build your car. You can't go wrong with this investment.

I didn't think that adding a new alternator would make such a GREAT difference in ZIP!!!!!!!, My 1999 mustang GT is supercharged and that added juice really brings it to life a VERY noticeable improvement over the stock alternator!!!

This product helped with power loss at idle when running air conditioning and other accessories. Take off is more smooth from a stop.only had it in for a week or two good so far.easy install exact fit no problems.

Quality of alternator worked well for about 500 miles.. it's at powermaster now currently being repaired said it was over spun. But I'm running stock pulleys, no forced induction or even cams. I have cams but not been installed yet. Said the internal fans were twisted. So for now stock alternator back on, it was bought mainly to improve my underpowered look plus the extra amperage. American Muscle did their part it just a 3 due to the issue with the defective product.

Powermaster Alternator - 200 Amp Black (99-04 GT)

Word on The Street

I've been looking on American Muscle since I bought my first Mustang a couple months ago. I decided to give them a try, when a product I wanted came up at a really great price. It was easy to buy, shipped fast, and their video guide made it a breeze to install my modification in less time than they even estimated. I look forward to continuing to do business with American Muscle as I modify my Mustang in the future.

Meet Our Team

I’ve owned 13 cars over the last 6 years, my 2011 5.0L GT being my favorite. As soon as this platform was released, I just had to have it! I went on a quest to find a Black 2011+ GT with Leather, Brembo Brakes, Performance Package and 3.73 Gears. After about 4 months, the perfect car popped up with ...